From: Robin H. Johnson Date: Mon, 16 Dec 2013 17:31:19 +0000 (-0800) Subject: libata: disable a disk via libata.force params X-Git-Tag: v3.2.55~36 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=commitdiff_plain;h=536b1f2107eddfd94b7ab11a787b460b1ac4941a libata: disable a disk via libata.force params commit b8bd6dc36186fe99afa7b73e9e2d9a98ad5c4865 upstream. A user on StackExchange had a failing SSD that's soldered directly onto the motherboard of his system. The BIOS does not give any option to disable it at all, so he can't just hide it from the OS via the BIOS. The old IDE layer had hdX=noprobe override for situations like this, but that was never ported to the libata layer. This patch implements a disable flag for libata.force. Example use: libata.force=2.0:disable [v2 of the patch, removed the nodisable flag per Tejun Heo] Signed-off-by: Robin H. Johnson Signed-off-by: Tejun Heo Link: http://unix.stackexchange.com/questions/102648/how-to-tell-linux-kernel-3-0-to-completely-ignore-a-failing-disk Link: http://askubuntu.com/questions/352836/how-can-i-tell-linux-kernel-to-completely-ignore-a-disk-as-if-it-was-not-even-co Link: http://superuser.com/questions/599333/how-to-disable-kernel-probing-for-drive [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings --- diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 2ba8272a4b82..1b196ea24a7c 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1305,6 +1305,8 @@ bytes respectively. Such letter suffixes can also be entirely omitted. * dump_id: dump IDENTIFY data. + * disable: Disable this device. + If there are multiple matching configurations changing the same attribute, the last one is used. diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c index c581b6b41654..72bbb5ed8096 100644 --- a/drivers/ata/libata-core.c +++ b/drivers/ata/libata-core.c @@ -6331,6 +6331,7 @@ static int __init ata_parse_force_one(char **cur, { "nohrst", .lflags = ATA_LFLAG_NO_HRST }, { "nosrst", .lflags = ATA_LFLAG_NO_SRST }, { "norst", .lflags = ATA_LFLAG_NO_HRST | ATA_LFLAG_NO_SRST }, + { "disable", .horkage_on = ATA_HORKAGE_DISABLE }, }; char *start = *cur, *p = *cur; char *id, *val, *endp;